// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_RENDERER_RENDER_ACCESSIBILITY_H_
#define CONTENT_PUBLIC_RENDERER_RENDER_ACCESSIBILITY_H_

#include "content/common/content_export.h"
#include "ui/accessibility/ax_node.h"
#include "ui/accessibility/ax_tree_data.h"
#include "ui/accessibility/ax_tree_source.h"

namespace content {

// This interface exposes the accessibility tree for one RenderFrame.
class CONTENT_EXPORT RenderAccessibility {
public:
    virtual int GenerateAXID() = 0;

    // These APIs allow a page with a single EMBED element to graft an
    // accessibility tree for the plugin content, implemented as an AXTreeSource,
    // into the page's accessibility tree.
    using PluginAXTreeSource = ui::AXTreeSource<const ui::AXNode*, ui::AXNodeData, ui::AXTreeData>;
    virtual void SetPluginTreeSource(PluginAXTreeSource* source) = 0;
    virtual void OnPluginRootNodeUpdated() = 0;

protected:
    ~RenderAccessibility() { }

private:
    // This interface should only be implemented inside content.
    friend class RenderAccessibilityImpl;
    RenderAccessibility() { }
};

} // namespace content

#endif // CONTENT_PUBLIC_RENDERER_RENDER_ACCESSIBILITY_H_
